Agreed with Sindy. I'll vote on topless if the film title suggests it with phrases like "butt naked nipples" or "show it all". If the title is "scantily dressed" and the actor is naked, no vote. Same goes for how I arrange my covers. If I get a premium cover that normally costs diamonds, I'll try to use it as much as I can -- that definitely includes the crotch and chest close-ups (bonus woohoo if I get "close-ups" in the title).
Getting more votes for newds...? Hah! I have yet to figure out what gets votes. I frequently look at the top covers when I start sliding from five diamonds to a single diamond for two films out of eight. I can't figure a rhyme or reason, but do see a lot of the top studios sitting at the top. That might be because they have a lot of excessively active members or it might be because they all vote for their own studio when they can. But I'm seeing horrible covers in the top ten -- title covering face, a title with "in nature" set against the pink room background. One time, I even saw a cover in top ten where the actor was completely obscured by other elements.
No idea what gets votes, and stopped caring. Gonna keep it in theme.